Bees

Bees Most bees are polylectic (generalist) meaning they collect pollen from a range of flowering plants, however, some are oligoleges (specialists), in that they only gather pollen from one or a few species or genera of closely related plants.[61] Specialist pollinators also include bee species which gather floral oils instead of pollen, and male orchid bees, which gather aromatic compounds from orchids (one of the few cases where male bees are effective pollinators). Bees are able to sense the presence of desirable flowers through ultraviolet patterning on flowers, floral odors,[62] and even electromagnetic fields.[63] Once landed, a bee then uses nectar quality[62] and pollen taste[64] to determine whether to continue visiting similar flowers. (Wikipedia https://en.wikipedia.org/wiki/Bee)